In Caithness especially, we have many a Norse castle site, such as Earl Harold's borg at Thurso, and Lambaborg, the modern Freswick, which we know to have been inhabited by noted Norsemen, while, in Sutherland, Borve near Farr, and Seanachaistel on the Farrid Head near Durness seem to be ideal Viking sites. _Breithivellir_[10] or Brawl Castle was a known residence of Earl John and later earls, and search for foundations might well be made on the coasts of Caithness, and round Tongue and at the mouths of the Naver and of the Borgie and other rivers, and at or near Unes or Little Ferry, possibly at Skelbo, (Skail-bo) and in Kildonan at Helmsdale. That the Norsemen used many of the Pictish brochs as dwelling-places is more than probable, and is proved by the Sagas in certain instances.[11] At the same time few articles used distinctively by Norsemen have been found in them. No stately church like the Cathedral of St. Magnus at Kirkwall, itself the finest specimen of Norman architecture in Scotland, survives on the mainland from Viking days; nor, so far as is known, was any such edifice built there by any Norseman; but the original High Church of Halkirk, and also the old church of St. Bar at Dornoch, which preceded and is believed to have occupied a site immediately to the east of St. Gilbert's later Cathedral, may have been used by the later jarls, and a few miles south of Halkirk are the foundations of the Spittal of St. Magnus,[12] part of which, and of St. Peter's Church at Thurso may be Norse. Though the towns of Wick and Thurso[13] are frequently mentioned in the _Orkneyinga Saga_, and earls and jarls stayed at both, no Sutherland village (if any save Dornoch existed) is named in it; but the site of modern Golspie (Gol's-by) appears in ancient charters as Platagall, "the Flat of the Stranger."[14] If in his outward and visible man the Norseman has all but faded away in Sutherland, he remains more in evidence in Caithness, in spite of Celtic mothers and successive waves of Scottish immigration. The high Norse skull, the tall frame with broad shoulders and narrow hips,[15] the fair hair and skin, the sea-blue eyes and sound teeth are still to be seen; and from time to time, amid greatly preponderating Celtic types, we are startled by coming across some perfect living specimen of the pure Viking type almost always on or near the coast. But, if the outward type is rarely seen, its inward qualities remain. What were those qualities? The late Professor York Powell summed up the character of the Viking emigrant folk in his introduction to Mr. Collingwood's _Scandinavian Britain_, as follows:--